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Delaware companies settle alleged Clean Air Act violations involving aftermarket devices for diesel trucks

February 18, 2021

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US EPA Region 3 Press Office (R3press@epa.gov)

PHILADELPHIA (Feb. 18, 2020) – The U.S. Environmental Protection Agency today announced two settlements with vehicle repair shops in Delaware that were involved in the illegal sale and installation of aftermarket devices that were designed to defeat the emissions control systems of heavy-duty diesel engines.

The companies – Delaware Speed and Custom LLC in Milton, and Bo Daddy’s Diesel and Auto Repair in Seaford – allegedly violated the Clean Air Act’s prohibition on the manufacture, sale or installation of so-called “defeat devices,” which are designed to “bypass, defeat or render inoperative” a motor vehicle engine’s air pollution control equipment or systems.

Illegally modified vehicles and engines contribute substantial excess pollution that harms public health and impedes efforts by EPA, tribes, states and local agencies to attain air quality standards.

Delaware Speed and Custom LLC paid a $12,529 penalty for allegedly selling defeat devices, and Bo Daddy’s paid a $6,000 penalty for allegedly selling and installing defeat devices.

Clean Air Act penalties take account of various factors such as the seriousness and duration of the violations, size of the business, the penalty’s impact on the business, compliance history, good faith efforts, and economic benefit of past non-compliance.

As part of the settlements, the companies have certified that they are now are in compliance with applicable requirements.

These enforcement actions are part of EPA’s National Compliance Initiative for Stopping Aftermarket Defeat Devices for Vehicles and Engines.

Today’s vehicles emit far less pollution than vehicles of the past. This is made possible by careful engine calibrations, and the use of filters and catalysts in the exhaust system. Aftermarket defeat devices undo this progress and pollute the air we breathe. EPA testing has shown that a truck’s emissions increase drastically (tens or hundreds of times, depending on the pollutant) when its emissions controls are removed.

For more information on this initiative, visit: https://www.epa.gov/enforcement/national-compliance-initiative-stopping-aftermarket-defeat-devices-vehicles-and-engines .

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